Caster Semenya's much-anticipated return to the track on June 24 in Spain appears to be unwelcome among some athletes.

According to The Times of London, some elite runners are considering boycotting races if Semenya is allowed to take part in women's events after the resolution of her protracted sex-test case.

The South African has not competed since her gender became a source of global debate when she won the 800m at the world championships in Berlin in August.

She has said she will return in Zaragoza next month.

In an interview with the British newspaper, Jenny Meadows, the Briton who took the bronze in Berlin and has been one of few athletes to back Semenya, said that some athletes won't run if the 19-year-old South African is cleared to compete.

This would put the International Association of Athletics Federations in a sticky position ahead of its promised resolution by the end of next month.